Rust-resisting alloy of iron



PATENT OFFICE.

GEORGE H. CEARLS, OF CANTON, OHIO.

RUST-RESISTING ALLOY OF IRON.

Specification of Reissued Letters Patent. Reissued Oct, 18, 1921.

lo Drawing. Original K6 1368564, dated December 28, 1920, Serial No. 392,912, filed June 80, 1920. Application for reissue filed March 21, 1921. Serial No. 454,228.

T all whom it may concern:

Be it known that I, GEORGE H. CHARLs, a citizen of the United States, and a resident of Canton, Stark county, State of Ohio, have 5 invented an Improvement in Rust-Resisting Alloys of Iron, of which the following is a s cification.

his invention relates to alloys of iron adapted to resist tendencies to rust andcorrosion. One of the objects thereof is to provide a practical alloy of the above type which will ossess rust-resisting properties to a marked degree. Another object is to provide an alloy of the above type which can be simply and inexpensively made. Other objects will be in part obvious and in plai-rt pointed out hereinafter.

e invention accordingly consists in certain features of the alloy herein illustratively described, and the scope of the application of which will be indicated in the following claims.

In my alloy, I use as a chief constitutent, iron; and it may be noted that the term 26 iron is used in a broad sense to comprehend the inclusion of a carbon, thus making what might more specifically be termed steel. Incorporated with the iron, aside from the elements usually associated there- 90 with in commercial p'ractlce, I include small quantities of both copper and molybdenum. The carbon is preferabl kept low, and by low carbon, I mean that t e content shall be not over 20%. The copper in the resultant 86 alloy is to be referably kept under 20% and I prefer to cop it somewhat lower. The molybdenum in this alloy produces beneficial results even when a considerable amount is used; but I preferably confine it to a smaIl 40 amount. In fact, better results are obtained with less molybdenum and I have secured excellent results with this element resent in the proportion ofabout .10%.. hile I have attained the best results with the above roportions, still it is to be understood that arger proportions of both copper and melybdenum may be used and a substantial rustresisting efiect in the resultant alloy be attained. The copper and molybdenum ma be added to the molten iron or steel pre e'rably in liquid form and in such manner that they will be uniformly distributed throughout the metal.

An alloy of the above nature has been found not only to possess the properties which are the dominant aim of this invention but to be readily workable and to be especially adapted for manufacture into sheets.

As variation might be made in the alloy herein set forth without departing from the scope of this invention, it is to be understood that it is herein described as illustrative rather than in a limiting sense.

I claim as my invention:

1. A rust-resisting alloy comprising iron, and small but effective amounts of copper and molybdenum.

2. A rust-resisting alloy comprising iron free from more than 20% of carbon, an effective amount of copper less than 20%, and a small but effective amount of molybdenum.

3. A rust-resisting alloy comprisin iron, carbon less than 20%, copper in an e ective amount but less than 20%, and molybdenum in an effective amount but less than 20%.

4. A rust-resisting alloy comprising iron free from more than 20% ofcarbon and having copper of an eifective amount but less than 20% and molybdenum of an amount less than 15%.

5. A rust-resisting alloy comprising iron free from more than 20% of carbon and having copper of an efiective amount but less than .15% and molybdenum of an amount less than 15%.

6. A rust-resisting. alloy comprising'iron free from carbon in an amount greater than .10%' and having copper to an efi'ective. amount but less-than 20% and molybdenum to an effective amount but less than .10%.

7. A rust-resisting alloy comprisin free from more than 20% of carbon an having effective amounts of both copper and molybdenum. I

8. A'rust-resisting alloy comprising iron carbon in an amount less than 20%, an copper and molybdenum insuch amounts as will give to the resultant alloy a substantial rust-resisting efiect.

Signed atCantomthis 17th day of March,

. GEORGE H.- OHARLS.

iron 

